Update dependencies for Django 6 compatibility

[07pepa]

Description

update to Django 6

Checklist:

• I've made sure that tests are updated accordingly (especially if adding or updating a template option)
• I've updated the documentation or confirm that my change doesn't require any updates

Rationale

Django 6 is in "active" supported

[luzfcb]

@07pepa, thanks for the PR.

Before any update, we generally need to ensure that all libraries in the dependency tree are compatible with the new Django version. This usually takes weeks or months. #6226